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The active ingredient in Viagra, sildenafil, works by blocking an enzyme called phosphodiesterase type 5 (PDE5)

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As soon as these additives are heated and aerosolized in an e-cigarette and inhaled, these toxins can move directly into the bloodstream. Marbrey leads a team of Duke researchers who are investigating how e-cigarettes affect pregnancy

The restrictions on vaping help to prevent these issues by making it harder for young people to get access to vaping products

The researchers of the study dont know why we are seeing this trend